Full Name Woofster
First Appearance (Barney and the Rocko Squad) Barney's Greatest Hits
Barney and the Rocko Squad Portrayer Joanne Vannicola
"With my Doggy Dictionary, I can tell you what any word means!"
— Woofster after he "takes over" because someone doesn't know what something means.

Woofster is the fifth Super Reader found in Super Why!. His "Dictionary Power" will have him use his Doggy Dictionary to look up words the other characters may not understand in order to make the situation for them easier to understand.

If Woofster was to appear in Xianghua in Rockoland, Rock Buddy would've not known what quicksand was. According to Woofster's Doggy Dictionary, quicksand is "loose, wet sand that things sink into and get stuck in." and he would define "Crash Gordon" by saying "Crash Gordon is the villain of Rockoland and the arch-nemesis of the Rocko Squad.".

During Barney and the Rocko Squad, Woofster, Barney, and the other Super Readers keep track of Ling Xiaoyu's crying.

Joanne Vannicola voices Woofster in Super Why! (superhero form only) and Barney and the Rocko Squad.